Display panel and display device

Abstract

The utility model provides a display panel and a display device, and the display panel comprises a substrate, a pixel circuit layer and a packaging layer which are disposed on the substrate, and a light-emitting unit and an ambient light signal collection module which are disposed between the pixel circuit layer and the packaging layer. The ambient light signal acquisition module is used for converting sensed ambient light into an electric signal, and the ambient light signal acquisition module and the light-emitting unit share part of the film layer. According to the utility model, the ambient light signal acquisition module is integrated in the display panel, so that the wiring and part-punching difficulty of the FPC can be reduced, the thickness reduction and cost reduction of the whole display module are facilitated, and the integration level and the additional value of the display panel are improved.

Description

Technical Field

[0001] The embodiments of the utility model relate to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] The technology of adjusting the display brightness of the display panel according to the change of ambient light is a function that many mobile terminal devices have, especially in smartphones and smart wearable products. At present, a dedicated ambient light sensor is placed under the display panel to realize this function. The ambient light sensor realizes functions such as lighting, signal conversion, and signal processing.

[0003] The main issues with using a dedicated ambient light sensor are:

[0004] 1) Because the ambient light sensor needs to be mounted on the module FPC (Flexible Printed Circuit), it will bring some difficulties to the FPC wiring, mounting and other designs, which is not conducive to material management.

[0005] 2) The ambient light sensor has a certain thickness, and placing it between the display panel and the FPC is not conducive to reducing the thickness of the overall display module.

[0006] 3) Ambient light sensors are not part of the display panel manufacturer’s materials and need to be purchased separately, which is not conducive to reducing the overall display module cost. Utility Model Content

[0007] The embodiments of the utility model provide a display panel and a display device, which are used to solve the problems that the existing display module uses a dedicated ambient light sensor, resulting in great design difficulty, large thickness and high cost.

[0008] In order to solve the above technical problems, the utility model is achieved as follows:

[0009] In a first aspect, an embodiment of the utility model provides a display panel, comprising: a substrate, a pixel circuit layer and a packaging layer arranged on the substrate, and a light-emitting unit and an ambient light signal acquisition module arranged between the pixel circuit layer and the packaging layer, the ambient light signal acquisition module being used to convert the sensed ambient light into an electrical signal, and the ambient light signal acquisition module shares part of the film layer with the light-emitting unit.

[0010] Optionally, the light-emitting unit comprises: a first anode layer, a light-emitting layer and a cathode layer which are stacked;

[0011] The ambient light signal acquisition module and the light emitting unit share the cathode layer, and the ambient light signal acquisition module includes: a second anode layer, a photosensitive layer and the cathode layer which are stacked.

[0012] Optionally, the light-emitting unit comprises: a first anode layer, a hole transport layer, a light-emitting layer, an electron transport layer and a cathode layer which are stacked;

[0013] The ambient light signal acquisition module shares the cathode layer, electron transport layer and / or hole transport layer with the light emitting unit, and the ambient light signal acquisition module includes: a stacked second anode layer, the hole transport layer, a photosensitive layer, the electron transport layer and the cathode layer.

[0014] Optionally, the substrate includes a display area and a peripheral area arranged outside the display area, and the ambient light signal acquisition module is arranged in the display area and / or the peripheral area.

[0015] Optionally, the display area includes a plurality of pixel areas arranged in a matrix, each of the pixel areas includes a plurality of the light-emitting units, and the ambient light signal acquisition module is disposed in at least a portion of the pixel areas.

[0016] Optionally, the light-emitting unit includes a red light-emitting unit, a green light-emitting unit and a blue light-emitting unit, each of the pixel areas includes a red light-emitting unit, a green light-emitting unit, a blue light-emitting unit and an ambient light signal acquisition module, and the red light-emitting unit, the green light-emitting unit, the blue light-emitting unit and the ambient light signal acquisition module in each of the pixel areas are arranged in a 2*2 matrix.

[0017] Optionally, also include:

[0018] The ambient light signal amplifying module is disposed on the substrate and connected to the ambient light signal collecting module, and is used for filtering and / or amplifying the electrical signal transmitted by the ambient light signal collecting module.

[0019] In a second aspect, an embodiment of the utility model provides a display device, comprising the display panel described in the first aspect.

[0020] Optionally, also include:

[0021] An ambient light signal amplifying module, used for filtering and / or amplifying the electrical signal transmitted by the ambient light signal collecting module;

[0022] and / or

[0023] A panel driver chip, the panel driver chip is bound and connected to the display panel and is used to provide a driving signal to the display panel;

[0024] and / or

[0025] an ambient light signal processing module, connected to the ambient light signal amplifying module, for performing analog-to-digital conversion processing on the electrical signal output by the ambient light signal amplifying module to obtain a digital signal, and processing the digital signal to obtain ambient light information that can be recognized by the whole machine processor of the display device;

[0026] and / or

[0027] A flexible printed circuit board, bound and connected to the display panel and connected to the ambient light signal processing module, and used for transmitting the signal output by the ambient light signal processing module to the whole machine processor of the display device;

[0028] and / or

[0029] The whole machine processor is used to send a brightness control instruction to the display panel according to the received ambient light information.

[0030] Optionally, the ambient light signal amplifying module is arranged on the display panel, or on the panel driving chip, or on the ambient light signal processing module.

[0031] In the embodiment of the utility model, an ambient light signal acquisition module integrated inside the display panel is used to replace the existing dedicated ambient light sensor. The ambient light signal acquisition module is integrated inside the display panel, so it is no longer necessary to punch it on the FPC, thereby reducing the difficulty of wiring and punching the FPC; and the ambient light signal acquisition module shares part of the film layer with the light-emitting unit, which is beneficial to reducing the thickness of the overall display module; and there is no need to purchase an ambient light sensor separately, which is beneficial to reducing the cost of the overall display module and improving the integration and added value of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limiting of the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0033] Figure 1 It is a schematic structural diagram of a display device having a display panel according to Embodiment 1 of the present utility model;

[0034] Figure 2 It is a schematic structural diagram of a display device having a display panel according to the second embodiment of the present utility model;

[0035] Figure 3 It is a structural schematic diagram of a display device having a display panel according to Embodiment 3 of the present utility model;

[0036] Figure 4It is a schematic diagram of the film layer and circuit connection structure of the display device of an embodiment of the utility model. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 An embodiment of the utility model provides a display panel 1, comprising: a substrate 11, a pixel circuit layer 12 and a packaging layer 13 arranged on the substrate 11, and a light-emitting unit 2 and an ambient light signal acquisition module 3 arranged between the pixel circuit layer 12 and the packaging layer 13, wherein the ambient light signal acquisition module 3 is used to convert the sensed ambient light into an electrical signal, and the ambient light signal acquisition module 3 shares part of the film layer with the light-emitting unit 2.

[0039] In the embodiment of the utility model, the ambient light signal acquisition module 3 is a photosensitive device having a photoelectric conversion function.

[0040] Optionally, the ambient light signal collection module 3 and the light emitting unit 2 are arranged on the same layer.

[0041] In the embodiment of the utility model, the pixel circuit layer 12 includes a driving circuit for driving the light-emitting unit 2 to emit light.

[0042] The encapsulation layer 13 may be a thin film encapsulation layer (TFE).

[0043] In the embodiment of the utility model, an ambient light signal acquisition module integrated inside the display panel is used to replace the existing dedicated ambient light sensor. The ambient light signal acquisition module is integrated inside the display panel, so it is no longer necessary to punch it on the FPC, thereby reducing the difficulty of wiring and punching the FPC; and the ambient light signal acquisition module shares part of the film layer with the light-emitting unit, which is beneficial to reducing the thickness of the overall display module; and there is no need to purchase an ambient light sensor separately, which is beneficial to reducing the cost of the overall display module and improving the integration and added value of the display panel.

[0044] In some embodiments, optionally, please refer to Figure 4The light-emitting unit 2 includes: a first anode layer 141, a light-emitting layer 143 and a cathode layer 145 arranged in a stacked manner; the ambient light signal acquisition module 3 shares the cathode layer 145 with the light-emitting unit 2, and the ambient light signal acquisition module 3 includes: a second anode layer 151, a photosensitive layer 152 and the cathode layer 145 arranged in a stacked manner.

[0045] In the embodiment of the utility model, the display panel 1 optionally includes light emitting units 2 of multiple colors, for example, a red light emitting unit, a green light emitting unit and a blue light emitting unit. The first anode layers 141 of different light emitting units 2 are independent, and all light emitting units 2 share the same cathode layer 145.

[0046] In the embodiment of the utility model, since the ambient light signal acquisition module 3 and the light emitting unit 2 share the cathode layer 145 , it is beneficial to reduce the thickness of the overall display module.

[0047] In some embodiments, optionally, please refer to Figure 4 The light-emitting unit 2 includes: a first anode layer 141, a hole transport layer (HTL) 142, a light-emitting layer 143, an electron transport layer (ETL) 144 and a cathode layer 145 arranged in a stacked manner; the ambient light signal acquisition module 3 shares the cathode layer 145, the electron transport layer 144 and / or the hole transport layer 142 with the light-emitting unit 2, and the ambient light signal acquisition module 3 includes: a second anode layer 151, the hole transport layer 142, a photosensitive layer 152, the electron transport layer 144 and the cathode layer 145 arranged in a stacked manner.

[0048] In the embodiment of the utility model, since the ambient light signal acquisition module 3 and the light emitting unit 2 share the cathode layer 145, the electron transport layer 144 and / or the hole transport layer 142, it is beneficial to reduce the thickness of the overall display module. In addition, although the second anode layer 151 of the ambient light signal acquisition module 3 and the first anode layer 141 of the light emitting unit 2 are located in the same layer, they are independent of each other. Although the photosensitive layer 152 of the ambient light signal acquisition module 3 and the first anode layer 141 of the light emitting layer 143 are located in the same layer, they are also independent of each other.

[0049] The light-emitting layer 143 in the light-emitting unit 2 in the embodiment of the utility model is a current-excited light-emitting element. Applying different currents between the anode layer and the cathode layer of the light-emitting unit 2 can change the light-emitting intensity of the light-emitting layer 143 to achieve brightness control.

[0050] In the embodiment of the utility model, the photosensitive layer 152 in the ambient light signal acquisition module 3 has the opposite principle to the light-emitting layer 143 in the light-emitting unit 2. The photosensitive layer 152 in the ambient light signal acquisition module 3 is a light-sensitive element. When ambient light of different intensities irradiates the photosensitive layer 152, the characteristics of the photosensitive layer 152 itself will change, thereby causing the current between the cathode layer and the anode layer of the ambient light signal acquisition module 3 to change. By amplifying and identifying the changing current between the cathode layer and the anode layer of the ambient light signal acquisition module 3, the change of ambient light can be analyzed, thereby realizing the function of ambient light signal acquisition.

[0051] In the embodiment of the utility model, the number of integration and the placement position of the ambient light signal acquisition module 3 on the display panel 1 can be flexibly set according to specific needs.

[0052] In the embodiment of the utility model, optionally, the substrate 11 includes a display area and a peripheral area arranged outside the display area, and the ambient light signal acquisition module 3 is arranged in the display area and / or the peripheral area. Figure 1-Figure 3 , Figure 1-Figure 3 In the illustrated embodiment, the ambient light signal acquisition module 3 is disposed in the display area.

[0053] In some embodiments, optionally, the display area includes a plurality of pixel areas arranged in a matrix, each of the pixel areas includes a plurality of the light-emitting units 2, and the ambient light signal acquisition module 3 is disposed in at least a portion of the pixel areas.

[0054] In some embodiments, optionally, please refer to Figure 1-Figure 3 The light-emitting unit 2 includes a red light-emitting unit, a green light-emitting unit and a blue light-emitting unit. Each of the pixel areas includes a red light-emitting unit, a green light-emitting unit, a blue light-emitting unit and an ambient light signal acquisition module 3. The red light-emitting unit, the green light-emitting unit, the blue light-emitting unit and the ambient light signal acquisition module in each pixel area are arranged in a 2*2 matrix.

[0055] It should be noted that, if the display panel 1 includes a plurality of ambient light signal acquisition modules 3 , the display panel 1 may further include a connection line 4 , and the plurality of ambient light signal acquisition modules 3 may be connected together via the connection line 4 .

[0056] In some embodiments, optionally, please refer to Figure 1 The display panel 1 also includes: an ambient light signal amplifying module 5, which is arranged on the substrate 11 and connected to the ambient light signal collecting module 3, and is used to filter and / or amplify the electrical signal transmitted by the ambient light signal collecting module 3.

[0057] Since the electrical signal generated by the ambient light signal acquisition module 3 is usually weak, in the embodiment of the utility model, an ambient light signal amplification module 5 is provided, and the ambient light signal amplification module 5 may include a signal amplification circuit for amplifying the electrical signal transmitted by the ambient light signal acquisition module 3. Optionally, the ambient light signal amplification module 5 may also include a signal filtering circuit for filtering the electrical signal transmitted by the ambient light signal acquisition module 3 to filter out noise influences.

[0058] In the embodiment of the utility model, the ambient light signal acquisition module 3 and the ambient light signal amplification module 5 can be connected through the connection line 4.

[0059] An embodiment of the utility model further provides a display device, comprising the display panel described in any one of the above embodiments.

[0060] In some embodiments, optionally, please refer to Figure 2 and Figure 3 The display device further includes: an ambient light signal amplifying module 5, which is used to filter and / or amplify the electrical signal transmitted by the ambient light signal collecting module.

[0061] In some embodiments, optionally, please refer to Figure 1-Figure 3 The display device further includes: a panel driving chip 6, which is bound and connected to the display panel 1 and is used to provide a driving signal to the display panel.

[0062] In some embodiments, optionally, please refer to Figure 1-Figure 3 The display device also includes: an ambient light signal processing module 8, which is connected to the ambient light signal amplifying module 5, and is used to perform analog-to-digital conversion on the electrical signal output by the ambient light signal amplifying module 5 to obtain a digital signal, and process the digital signal to obtain ambient light information that can be recognized by the whole machine processor of the display device.

[0063] In the present utility model embodiment, please refer to Figure 1-Figure 4 The ambient light signal processing module 8 may include an analog-to-digital conversion circuit (ADC), a digital signal processing circuit (i.e. Figure 1-Figure 4 The analog-to-digital conversion circuit is used to perform analog-to-digital conversion processing on the electrical signal output by the ambient light signal amplifying module 5 to obtain a digital signal, and to process the digital signal to obtain ambient light information that can be recognized by the whole machine processor of the display device to obtain a digital signal. The digital signal processing circuit is used to process the digital signal output by the analog-to-digital conversion circuit to obtain ambient light information that can be recognized by the whole machine processor. The I / O interface is used for signal input / output.

[0064] In some embodiments, optionally, please refer to Figure 1-Figure 3 The display device further includes: a flexible printed circuit board 7, which is bound and connected to the display panel 1 and connected to the ambient light signal processing module 8. The printed circuit board 7 is a bridge connecting the display panel 1 and the whole machine processor of the display device, and is used to transmit the signal output by the ambient light signal processing module 8 to the whole machine processor of the display device. Optionally, the printed circuit board 7 is used to place the peripheral devices required by the panel driver chip 6 and the ambient light signal processing module 8.

[0065] In some embodiments, optionally, the display device also includes: a whole machine processor (also called a motherboard), which is used to send brightness control instructions to the display panel according to the received ambient light information to adjust the brightness of the display panel to achieve an ambient light adaptive brightness adjustment function.

[0066] Through the above display panel, the process of collecting ambient light signals → filtering and amplifying → analyzing and processing → whole machine processor → panel dimming can be realized, replacing the function of traditional dedicated ambient light sensors.

[0067] In some embodiments, optionally, please refer to Figure 1 , the ambient light signal amplifying module 5 is disposed on the display panel 1 .

[0068] In some embodiments, optionally, please refer to Figure 2 , the ambient light signal amplifying module 5 is disposed on the panel driving chip 6. Compared with the above Figure 1 The advantages of the embodiment shown in the figure are that the space of the display panel 1 can be saved and the integration and added value of the panel driver chip 6 can be improved.

[0069] In some embodiments, optionally, please refer to Figure 3 , the ambient light signal amplifying module 5 is arranged on the ambient light signal processing module 8. Compared with the above Figure 1 and Figure 2 The advantage of the embodiment shown is that the space of the display panel 1 and the panel driver chip 6 can be saved, and the integration and added value of the ambient light signal processing module 8 can be improved.

[0070] The display panel and display device of the present invention have the following advantages:

[0071] 1) There is no need to mount a dedicated ambient light sensor on the FPC, which is beneficial to the space design and material management of the FPC.

[0072] 2) There is no need to place an ambient light sensor between the FPC and the display panel, which is beneficial to reducing the thickness of the overall module.

[0073] 3) There is no need to purchase ambient light sensors separately, which helps reduce the overall module cost of display panel manufacturers.

[0074] 4) Integrating the modules for collecting, amplifying and processing ambient light signals inside the display panel is beneficial to improving the overall integration technology of the display panel and increasing the added value of the display panel.

[0075] The embodiments of the utility model are described above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the utility model, ordinary technicians in this field can also make many forms without departing from the scope of protection of the utility model and the claims, all of which are within the protection of the utility model.

Claims

1. A display panel, characterized in that: include: A substrate, a pixel circuit layer and a packaging layer arranged on the substrate, and a light-emitting unit and an ambient light signal acquisition module arranged between the pixel circuit layer and the packaging layer. The ambient light signal acquisition module is used to convert the sensed ambient light into an electrical signal. The ambient light signal acquisition module shares part of the film layer with the light-emitting unit.

2. The display panel according to claim 1, characterized in that: The light-emitting unit comprises: a first anode layer, a light-emitting layer and a cathode layer which are stacked; The ambient light signal acquisition module and the light emitting unit share the cathode layer, and the ambient light signal acquisition module includes: a second anode layer, a photosensitive layer and the cathode layer which are stacked.

3. The display panel according to claim 1, wherein: The light-emitting unit comprises: a first anode layer, a hole transport layer, a light-emitting layer, an electron transport layer and a cathode layer arranged in a stacked manner; The ambient light signal acquisition module shares the cathode layer, electron transport layer and / or hole transport layer with the light emitting unit, and the ambient light signal acquisition module includes: a stacked second anode layer, the hole transport layer, a photosensitive layer, the electron transport layer and the cathode layer.

4. The display panel according to any one of claims 1 to 3, characterized in that: The substrate includes a display area and a peripheral area arranged outside the display area, and the ambient light signal acquisition module is arranged in the display area and / or the peripheral area.

5. The display panel according to claim 4, characterized in that: The display area includes a plurality of pixel areas arranged in a matrix, each of the pixel areas includes a plurality of the light-emitting units, and the ambient light signal acquisition module is disposed in at least a portion of the pixel areas.

6. The display panel according to claim 5, characterized in that: The light-emitting units include a red light-emitting unit, a green light-emitting unit and a blue light-emitting unit, each of the pixel areas includes a red light-emitting unit, a green light-emitting unit, a blue light-emitting unit and an ambient light signal acquisition module, and the red light-emitting units, green light-emitting units, blue light-emitting units and the ambient light signal acquisition module in each pixel area are arranged in a 2*2 matrix.

7. The display panel according to claim 1, characterized in that: Also includes: The ambient light signal amplifying module is disposed on the substrate and connected to the ambient light signal collecting module, and is used for filtering and / or amplifying the electrical signal transmitted by the ambient light signal collecting module.

8. A display device, characterized in that: Comprising the display panel as described in any one of claims 1-7.

9. The display device according to claim 8, characterized in that: Also includes: An ambient light signal amplifying module, used for filtering and / or amplifying the electrical signal transmitted by the ambient light signal collecting module; and / or A panel driver chip, the panel driver chip is bound and connected to the display panel and is used to provide a driving signal to the display panel; and / or an ambient light signal processing module, connected to the ambient light signal amplifying module, for performing analog-to-digital conversion processing on the electrical signal output by the ambient light signal amplifying module to obtain a digital signal, and processing the digital signal to obtain ambient light information that can be recognized by the whole machine processor of the display device; and / or A flexible printed circuit board, bound and connected to the display panel and connected to the ambient light signal processing module, and used for transmitting the signal output by the ambient light signal processing module to the whole machine processor of the display device; and / or The whole machine processor is used to send a brightness control instruction to the display panel according to the received ambient light information.

10. The display device according to claim 9, characterized in that: The ambient light signal amplifying module is disposed on the display panel, or on the panel driving chip, or on the ambient light signal processing module.

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